Windows 7: CD/DVD Files Not Appearing

Can anyone help me decifer why my system will no longer display the contents of my CD/DVDs? I have been going through some older CD/DVD (RW) that have various files on them, zip, jpg, txt, doc etc. Looking from Explorer 'Computer' the disk will show once inserted and state it has (for example) 23.2MB free of 702MB but when I select the drive to view the contents all I see is desktop.ini and nothing else. Strange since it recognizes the media has 23.2MB free which means there is data present.

Now, I absolutely know this system showed contents at one time (like yesterday)for anything I inserted to read. I've rebooted also. I can also move the media to another machine, running Linux ;-) and it displays the contents just fine. I have tried other media that I know I have recently written (from this system) and they show exactly the same thing now one file desktop.ini and that's it. I have seen this before under W2K, WXP and now Windows 7 but this system is brand new and much more modern hardware but never ever found a solution.

Any help/thoughts greatly appreciated. Other diag information can be provided if necessary.

Might be possible the discs are formatted with a version of UDF that Windows doesn't understand.

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